handle.h

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#ifndef LELY_IO_INTERN_HANDLE_H_
#define LELY_IO_INTERN_HANDLE_H_
 
#include "io.h"
#ifndef LELY_NO_ATOMICS
#define LELY_NO_ATOMICS 1
#ifndef LELY_NO_THREADS
#include <lely/libc/stdatomic.h>
#ifndef __STDC_NO_ATOMICS__
#undef LELY_NO_ATOMICS
#endif
#endif
#endif
#ifndef LELY_NO_THREADS
#include <lely/libc/threads.h>
#endif
 
struct io_handle_vtab;
 
struct io_handle {
        const struct io_handle_vtab *vtab;
#ifndef LELY_NO_ATOMICS
        atomic_size_t ref;
#elif !defined(LELY_NO_THREADS) && defined(_WIN32)
        volatile LONG ref;
#else
        size_t ref;
#endif
#ifdef _WIN32
        HANDLE fd;
#else
        int fd;
#endif
        int flags;
#ifndef LELY_NO_THREADS
        mtx_t mtx;
#endif
};
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct io_handle_vtab {
        int type;
        size_t size;
        void (*fini)(struct io_handle *handle);
        int (*flags)(struct io_handle *handle, int flags);
        ssize_t (*read)(struct io_handle *handle, void *buf, size_t nbytes);
        ssize_t (*write)(struct io_handle *handle, const void *buf,
                        size_t nbytes);
        int (*flush)(struct io_handle *handle);
        io_off_t (*seek)(struct io_handle *handle, io_off_t offset, int whence);
        ssize_t (*pread)(struct io_handle *handle, void *buf, size_t nbytes,
                        io_off_t offset);
        ssize_t (*pwrite)(struct io_handle *handle, const void *buf,
                        size_t nbytes, io_off_t offset);
        int (*purge)(struct io_handle *handle, int flags);
        ssize_t (*recv)(struct io_handle *handle, void *buf, size_t nbytes,
                        io_addr_t *addr, int flags);
        ssize_t (*send)(struct io_handle *handle, const void *buf,
                        size_t nbytes, const io_addr_t *addr, int flags);
        struct io_handle *(*accept)(struct io_handle *handle, io_addr_t *addr);
        int (*connect)(struct io_handle *handle, const io_addr_t *addr);
};
 
struct io_handle *io_handle_alloc(const struct io_handle_vtab *vtab);
 
void io_handle_free(struct io_handle *handle);
 
void io_handle_fini(struct io_handle *handle);
 
void io_handle_destroy(struct io_handle *handle);
 
#ifdef LELY_NO_THREADS
#define io_handle_lock(handle)
#else
void io_handle_lock(struct io_handle *handle);
#endif
 
#ifdef LELY_NO_THREADS
#define io_handle_unlock(handle)
#else
void io_handle_unlock(struct io_handle *handle);
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif // !LELY_IO_INTERN_HANDLE_H_